BFS and DFS Traversals | Dataford Interview Questions

Describe how you would perform breadth-first search and depth-first search traversals on trees or graphs.

Write Python functions that return the traversal order for a connected tree or graph represented as an adjacency list. Assume nodes are hashable values, and the graph may be directed or undirected. Use iterative BFS and DFS, and visit neighbors in the order they appear in the adjacency list.

Constraints

1 <= number of nodes <= 10^4
Each adjacency list contains zero or more neighbors
Nodes are hashable values
The graph is connected from the start node
Visit neighbors in the order they appear in the adjacency list

Function Signature

def traverse_graph(graph, start):

Your question is BFS and DFS Traversals. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Describe how you would perform breadth-first search and depth-first search traversals on trees or graphs.

Constraints

1 <= number of nodes <= 10^4
Each adjacency list contains zero or more neighbors
Nodes are hashable values
The graph is connected from the start node
Visit neighbors in the order they appear in the adjacency list

Function Signature

def traverse_graph(graph, start):

Your question is BFS and DFS Traversals. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.